...or is it "Getting the hang of black and white"???
Well: Here are some of my and my wifes images that looked just more adequate in b&w. It concentrates on the pattern and silhouette/outline of things:

Carlos, good question!
Perhaps #2 stands out between the three other images that display trees, so it appears as sort of a mismatch.
At Flickr I got a fav and three comments for bubbles, but no comments or faves for #1. But #1 got the most views...
----------------
Oh, and btw: lines are typical male, while circles are typical female. So perhaps that could explain voting